Fix for #1849 (PCAN fails when PCAN_ERROR_ILLDATA is read via ReadFD) (#1850)

* When there is an invalid frame on CAN bus (in our case CAN FD), PCAN first reports result PCAN_ERROR_ILLDATA and then it send the error frame. If the PCAN_ERROR_ILLDATA is not ignored, python-can throws an exception.

This fix add the ignore on the PCAN_ERROR_ILLDATA.

* Fix for ruff error `can/interfaces/pcan/pcan.py:5:1: I001 [*] Import block is un-sorted or un-formatted`
Added comment explaining why to ignore the PCAN_ERROR_ILLDATA.

Author: bures

can/interfaces/pcan/pcan.py

@@ -43,6 +43,7 @@
     PCAN_DICT_STATUS,
     PCAN_ERROR_BUSHEAVY,
     PCAN_ERROR_BUSLIGHT,
+    PCAN_ERROR_ILLDATA,
     PCAN_ERROR_OK,
     PCAN_ERROR_QRCVEMPTY,
     PCAN_FD_PARAMETER_LIST,
@@ -555,6 +556,12 @@ def _recv_internal(
             elif result & (PCAN_ERROR_BUSLIGHT | PCAN_ERROR_BUSHEAVY):
                 log.warning(self._get_formatted_error(result))
 
+            elif result == PCAN_ERROR_ILLDATA:
+                # When there is an invalid frame on CAN bus (in our case CAN FD), PCAN first reports result PCAN_ERROR_ILLDATA
+                # and then it sends the error frame. If the PCAN_ERROR_ILLDATA is not ignored, python-can throws an exception.
+                # So we ignore any PCAN_ERROR_ILLDATA results here.
+                pass
+
             else:
                 raise PcanCanOperationError(self._get_formatted_error(result))